What will be the output of the following C# code?

static void Main(string[] args)
{
    int const p = 0;
    switch (3 * 5 / 6)
    {
    case p: 
        Console.WriteLine("A");
        break;
    case p * 1:
        Console.WriteLine("B");
        break;
    case p - 2:
        Console.WriteLine("C");
        break;
    default: 
        Console.WriteLine("D");
    }
}

A. A

B. B

C. C

D. Compile time error

Answer: Option D